.TH UVG266 "1" "July 2024" "uvg266 v0.8.1" "User Commands"
.SH NAME
uvg266 \- open source VVC encoder
.SH SYNOPSIS
\fBuvg266 \fR\-i <input> \-\-input\-res <width>x<height> \-o <output>
.SH DESCRIPTION
.TP
\fB\-i\fR, \fB\-\-input <filename>    
Input file
.TP
\fB\-\-input\-res <res>     
Input resolution [auto]
    \- auto: Detect from file name.
    \- <int>x<int>: width times height
.TP
\fB\-o\fR, \fB\-\-output <filename>   
Output file

.SS "Presets:"
.TP
\fB\-\-preset <preset>     
Set options to a preset [medium]
    \- ultrafast, superfast, veryfast, faster,
      fast, medium, slow, slower, veryslow
      placebo

.SS "Input:"
.TP
\fB\-n\fR, \fB\-\-frames <integer>    
Number of frames to code [all]
.TP
\fB\-\-seek <integer>      
First frame to code [0]
.TP
\fB\-\-input\-fps <num>[/<denom>]
Frame rate of the input video [25]
.TP
\fB\-\-source\-scan\-type <string>
Source scan type [progressive]
    \- progressive: Progressive scan
    \- tff: Top field first
    \- bff: Bottom field first
.TP
\fB\-\-input\-format <string>
P420 or P400 [P420]
.TP
\fB\-\-input\-bitdepth <int>
8\-16 [8]
.TP
\fB\-\-loop\-input          
Re\-read input file forever.
.TP
\fB\-\-input\-file\-format <string>
Input file format [auto]
     \- auto: Check the file ending for format
     \- y4m (skips frame headers)
     \- yuv

.SS "Options:"
.TP
\fB\-\-help                
Print this help message and exit.
.TP
\fB\-\-version             
Print version information and exit.
.TP
\fB\-\-(no\-)aud            
Use access unit delimiters. [disabled]
.TP
\fB\-\-debug <filename>    
Output internal reconstruction.
.TP
\fB\-\-(no\-)cpuid          
Enable runtime CPU optimizations. [enabled]
.TP
\fB\-\-hash <string>       
Decoded picture hash [checksum]
    \- none: 0 bytes
    \- checksum: 18 bytes
    \- md5: 56 bytes
.TP
\fB\-\-(no\-)psnr           
Calculate PSNR for frames. [enabled]
.TP
\fB\-\-(no\-)info           
Add encoder info SEI. [enabled]
.TP
\fB\-\-stats\-file\-prefix   
A prefix used for stats files that include
bits, lambda, distortion, and qp for each ctu.
These are meant for debugging and are not
written unless the prefix is defined.
.TP
\fB\-\-cabac\-debug\-file    
A debug file for cabac context.
Ignore this, it is only for tests.

.SS "Video structure:"
.TP
\fB\-q\fR, \fB\-\-qp <integer>        
Quantization parameter [22]
.TP
\fB\-p\fR, \fB\-\-period <integer>    
Period of intra pictures [64]
    \- 0: Only first picture is intra.
    \- 1: All pictures are intra.
    \- N: Every Nth picture is intra.
.TP
\fB\-\-vps\-period <integer>
How often the video parameter set is re\-sent [0]
    \- 0: Only send VPS with the first frame.
    \- N: Send VPS with every Nth intra frame.
.TP
\fB\-r\fR, \fB\-\-ref <integer>       
Number of reference frames, in range 1..15 [4]
.TP
\fB\-\-gop <string>        
GOP structure [lp\-g4d3t1]
    \-  0: Disabled
    \-  8: B\-frame pyramid of length 8
    \- 16: B\-frame pyramid of length 16
    \- lp\-<string>: Low\-delay P/B\-frame GOP
      (e.g. lp\-g8d4t2, see README)
.TP
\fB\-\-intra\-qp\-offset <int>: QP offset for intra frames [\-51..51] [auto]
    \- N: Set QP offset to N.
    \- auto: Select offset automatically based
      on GOP length.
.TP
\fB\-\-(no\-)open\-gop       
Use open GOP configuration. [enabled]
.TP
\fB\-\-cqmfile <filename>  
Read custom quantization matrices from a file.
.TP
\fB\-\-scaling\-list <string>: Set scaling list mode. [off]
    \- off: Disable scaling lists.
    \- custom: use custom list (with \-\-cqmfile).
    \- default: Use default lists.
.TP
\fB\-\-bitrate <integer>   
Target bitrate [0]
    \- 0: Disable rate control.
    \- N: Target N bits per second.
.TP
\fB\-\-rc\-algorithm <string>: Select used rc\-algorithm. [lambda]
    \- lambda: rate control from:
      DOI: 10.1109/TIP.2014.2336550 
    \- oba: DOI: 10.1109/TCSVT.2016.2589878
.TP
\fB\-\-(no\-)intra\-bits     
Use Hadamard cost based allocation for intra
frames. Default on for gop 8 and off for lp\-gop
.TP
\fB\-\-(no\-)clip\-neighbour 
On oba based rate control whether to clip 
lambda values to same frame's ctus or previous'.
Default on for RA GOPS and disabled for LP.
.TP
\fB\-\-(no\-)lossless       
Use lossless coding. [disabled]
.TP
\fB\-\-mv\-constraint <string>
Constrain movement vectors. [none]
    \- none: No constraint
    \- frametile: Constrain within the tile.
    \- frametilemargin: Constrain even more.
.TP
\fB\-\-roi <filename>      
Use a delta QP map for region of interest.
Reads an array of delta QP values from a file.
Text and binary files are supported and detected
from the file extension (.txt/.bin). If a known
extension is not found, the file is treated as
a text file. The file can include one or many
ROI frames each in the following format:
width and height of the QP delta map followed
by width * height delta QP values in raster
order. In binary format, width and height are
32\-bit integers whereas the delta QP values are
signed 8\-bit values. The map can be of any size
and will be scaled to the video size. The file
reading will loop if end of the file is reached.
See roi.txt in the examples folder.
.TP
\fB\-\-set\-qp\-in\-cu        
Set QP at CU level keeping pic_init_qp_minus26.
in PPS and slice_qp_delta in slize header zero.
.TP
\fB\-\-(no\-)erp\-aqp        
Use adaptive QP for 360 degree video with
equirectangular projection. [disabled]
.TP
\fB\-\-level <number>      
Use the given HEVC level in the output and give
an error if level limits are exceeded. [6.2]
    \- 1, 2, 2.1, 3, 3.1, 4, 4.1, 5, 5.1, 5.2, 6,
      6.1, 6.2
.TP
\fB\-\-force\-level <number>
Same as \-\-level but warnings instead of errors.
.TP
\fB\-\-high\-tier           
Used with \-\-level. Use high tier bitrate limits
instead of the main tier limits during encoding.
High tier requires level 4 or higher.
.TP
\fB\-\-(no\-)vaq <integer>  
Enable variance adaptive quantization with given
strength, in range 1..20. Recommended: 5.
[disabled]
.TP
\fB\-\-chroma\-qp\-in        
List of input values used for mapping the luma
QP into chroma qp. [17,27,32,44]
.TP
\fB\-\-chroma\-qp\-out       
List of output values used for mapping the luma
QP into chroma qp. These two lists have to be
same length, start with same value, and can
contain maximum 16 or 36 \- starting value
elements. [17,27,32,44]
.TP
\fB\-\-(no\-)dual\-tree      
Use separate CTU structure for luma and
chroma in intra slices.

.SS "Compression tools:"
.TP
\fB\-\-(no\-)deblock <beta:tc>
Deblocking filter. [0:0]
    \- beta: Between \-6 and 6
    \- tc: Between \-6 and 6
.TP
\fB\-\-sao <string>        
Sample Adaptive Offset [full]
    \- off: SAO disabled
    \- band: Band offset only
    \- edge: Edge offset only
    \- full: Full SAO
.TP
\fB\-\-alf <string>        
Adaptive Loop Filter [off]
    \- off: ALF disabled
    \- no\-cc: ALF enabled without cross component
             refinement
    \- full: Full ALF
.TP
\fB\-\-(no\-)rdoq           
Rate\-distortion optimized quantization [enabled]
.TP
\fB\-\-(no\-)rdoq\-skip      
Skip RDOQ for 4x4 blocks. [disabled]
.TP
\fB\-\-(no\-)dep\-quant      
Use dependent quantization. [disabled]
.TP
\fB\-\-(no\-)signhide       
Sign hiding [disabled]
.TP
\fB\-\-rd <integer>        
Intra mode search complexity [0]
    \- 0: Skip intra if inter is good enough.
    \- 1: Rough intra mode search with SATD.
    \- 2: Refine intra mode search with SSE.
    \- 3: Enable intra chroma mode search.
    \- 4: Try all intra modes.
.TP
\fB\-\-(no\-)mv\-rdo         
Rate\-distortion optimized motion vector costs
[disabled]
.TP
\fB\-\-(no\-)zero\-coeff\-rdo 
If a CU is set inter, check if forcing zero
residual improves the RD cost. [enabled]
.TP
\fB\-\-(no\-)full\-intra\-search
Try all intra modes during rough search.
[disabled]
.TP
\fB\-\-(no\-)transform\-skip 
Try transform skip [disabled]
.TP
\fB\-\-(no\-)chroma\-transform\-skip
Try transform skip for chroma 
      blocks. [disabled]
.TP
\fB\-\-tr\-skip\-max\-size    
Max log2 size of transform skip 2..5 [2]
.TP
\fB\-\-me <string>         
Integer motion estimation algorithm [hexbs]
    \- hexbs: Hexagon Based Search
    \- tz:    Test Zone Search
    \- full:  Full Search
    \- full8, full16, full32, full64
    \- dia:   Diamond Search
.TP
\fB\-\-me\-steps <integer>  
Motion estimation search step limit. Only
affects 'hexbs' and 'dia'. [\-1]
.TP
\fB\-\-subme <integer>     
Fractional pixel motion estimation level [4]
    \- 0: Integer motion estimation only
    \- 1: + 1/2\-pixel horizontal and vertical
    \- 2: + 1/2\-pixel diagonal
    \- 3: + 1/4\-pixel horizontal and vertical
    \- 4: + 1/4\-pixel diagonal
.TP
\fB\-\-pu\-depth\-inter <int>\-<int>
Maximum and minimum split depths where
      inter search is performed 0..8. [0\-3]
    \- Accepts a list of values separated by ','
      for setting separate depths per GOP layer
      (values can be omitted to use the first
      value for the respective layer).
.TP
\fB\-\-pu\-depth\-intra <int>\-<int>
Maximum and minimum split depths where
      intra search is performed 0..8. [1\-4]
    \- Accepts a list of values separated by ','
      for setting separate depths per GOP layer
      (values can be omitted to use the first
      value for the respective layer).
.TP
\fB\-\-ml\-pu\-depth\-intra   
Predict the pu\-depth\-intra using machine
 learning trees, overrides the
 \-\-pu\-depth\-intra parameter. [disabled]
.TP
\fB\-\-mtt\-depth\-intra     
Depth of mtt for intra slices 0..3.[0]
.TP
\fB\-\-mtt\-depth\-intra\-chroma
Depth of mtt for chroma dual tree in
       intra slices 0..3.[0]
.TP
\fB\-\-mtt\-depth\-inter     
Depth of mtt for inter slices 0..3.[0]
                              All MTTs are currently experimental and
                              require disabling some avx2 optimizations.
.TP
\fB\-\-max\-bt\-size         
maximum size for a CU resulting from
    a bt split. A singular value shared for all
    or a list of three values for the different
    slices types (intra, inter, intra\-chroma)
    can be provided. [64, 64, 32]
.TP
\fB\-\-max\-tt\-size         
maximum size for a CU resulting from
    a tt split. A singular value shared for all
    or a list of three values for the different
    slices types (intra, inter, intra\-chroma)
    can be provided. [64, 64, 32]
.TP
\fB\-\-intra\-rough\-granularity
How many levels are used for the
    logarithmic intra rough search. 0..4
    With 0 all of the modes are checked 
    in a single level, 1 checks every second
    mode is checked on first level and then
    second level checks the modes surrounding
    the three best modes. [2]
.TP
\fB\-\-(no\-)combine\-intra\-cus: Whether the encoder tries to code a cu
    on lower depth even when search is not
    performed on said depth. Should only
    be disabled if cus absolutely must not
    be larger than limited by the search.
    [enabled]
.TP
\fB\-\-force\-inter         
Force the encoder to use inter always.
This is mostly for debugging and is not
guaranteed to produce sensible bitstream or
work at all. [disabled]
.TP
\fB\-\-(no\-)bipred         
Bi\-prediction [disabled]
.TP
\fB\-\-cu\-split\-termination <string>
CU split search termination [zero]
    \- off: Don't terminate early.
    \- zero: Terminate when residual is zero.
.TP
\fB\-\-me\-early\-termination <string>
Motion estimation termination [on]
    \- off: Don't terminate early.
    \- on: Terminate early.
    \- sensitive: Terminate even earlier.
.TP
\fB\-\-fast\-residual\-cost <int>
Skip CABAC cost for residual coefficients
    when QP is below the limit. [0]
.TP
\fB\-\-fast\-coeff\-table <string>
Read custom weights for residual
     coefficients from a file instead of using
     defaults [default]
.TP
\fB\-\-fast\-rd\-sampling
Enable learning data sampling for fast coefficient
                           table generation
.TP
\fB\-\-fastrd\-accuracy\-check
Evaluate the accuracy of fast coefficient
 prediction
.TP
\fB\-\-fastrd\-outdir
Directory to which to output sampled data or accuracy
                        data, into <fastrd\-outdir>/0.txt to 50.txt, one file
                        for each QP that blocks were estimated on
.TP
\fB\-\-(no\-)intra\-rdo\-et   
Check intra modes in rdo stage only until
a zero coefficient CU is found. [disabled]
.TP
\fB\-\-(no\-)early\-skip     
Try to find skip cu from merge candidates.
Perform no further search if skip is found.
For rd = 0..1: Try the first candidate.
For rd = 2..
Try the best candidate based
               on luma satd cost. [enabled]
.TP
\fB\-\-max\-merge <integer> 
Maximum number of merge candidates, 1..6 [6]
.TP
\fB\-\-(no\-)implicit\-rdpcm 
Implicit residual DPCM. Currently only supported
with lossless coding. [disabled]
.TP
\fB\-\-(no\-)tmvp           
Temporal motion vector prediction [enabled]
.TP
\fB\-\-(no\-)mrl            
Enable use of multiple reference lines in intra
predictions.
.TP
\fB\-\-(no\-)mip            
Enable matrix weighted intra prediction.
.TP
\fB\-\-(no\-)lfnst          
Enable low frequency non\-separable transform.
  [disabled]
.TP
\fB\-\-(no\-)isp            
Enable intra sub partitions. [disabled]
Experimental, requires disabling some avx2
optimizations.
.TP
\fB\-\-mts <string>        
Multiple Transform Selection [off].
(Currently only implemented for intra
and has effect only when rd >= 2)
    \- off: MTS disabled
    \- intra: MTS applied only for intra blocks.
    \- inter: MTS applied only for inter blocks.
    \- both: MTS applied for both intra and inter
            blocks.
    \- implicit: uses implicit MTS. Applies DST7
                instead of DCT2 to certain intra
                blocks.
.TP
\fB\-\-(no\-)jccr           
Joint coding of chroma residual.
Requires rdo >= 2. [disabled]
.TP
\fB\-\-(no\-)cclm           
Cross component linear model. 
Extra chroma prediction modes that are formed
via linear transformation from the luma
prediction. Requires rdo >= 3. [disabled
.TP
\fB\-\-(no\-)amvr           
Adaptive Motion Vector Resolution.
Code some MVs with reduced resolution [disabled]

.SS "Parallel processing:"
.TP
\fB\-\-threads <integer>   
Number of threads to use [auto]
    \- 0: Process everything with main thread.
    \- N: Use N threads for encoding.
    \- auto: Select automatically.
.TP
\fB\-\-owf <integer>       
Frame\-level parallelism [auto]
    \- N: Process N+1 frames at a time.
    \- auto: Select automatically.
.TP
\fB\-\-(no\-)wpp            
Wavefront parallel processing. [enabled]
Enabling tiles automatically disables WPP.
To enable WPP with tiles, re\-enable it after
enabling tiles. Enabling wpp with tiles is,
however, an experimental feature since it is
not supported in any HEVC profile.
.TP
\fB\-\-tiles <int>x<int>   
Split picture into width x height uniform tiles.
.TP
\fB\-\-tiles\-width\-split <string>|u<int>
    \- <string>: A comma\-separated list of tile
                column pixel coordinates.
    \- u<int>: Number of tile columns of uniform
              width.
.TP
\fB\-\-tiles\-height\-split <string>|u<int>
    \- <string>: A comma\-separated list of tile
                row column pixel coordinates.
    \- u<int>: Number of tile rows of uniform
              height.
.TP
\fB\-\-slices <string>     
Control how slices are used.
    \- tiles: Put tiles in independent slices.
    \- wpp: Put rows in dependent slices.
    \- tiles+wpp: Do both.
.TP
\fB\-\-partial\-coding <x\-offset>!<y\-offset>!<slice\-width>!<slice\-height>
                            
Encode partial frame.
Parts must be merged to form a valid bitstream.
X and Y are CTU offsets.
Slice width and height must be divisible by CTU
in pixels unless it is the last CTU row/column.
This parameter is used by kvaShare.

.SS "Video Usability Information:"
.TP
\fB\-\-sar <width:height>  
Specify sample aspect ratio
.TP
\fB\-\-overscan <string>   
Specify crop overscan setting [undef]
    \- undef, show, crop
.TP
\fB\-\-videoformat <string>
Specify video format [undef]
    \- undef, component, pal, ntsc, secam, mac
.TP
\fB\-\-range <string>      
Specify color range [tv]
    \- tv, pc
.TP
\fB\-\-colorprim <string>  
Specify color primaries [undef]
    \- undef, bt709, bt470m, bt470bg,
      smpte170m, smpte240m, film, bt2020
.TP
\fB\-\-transfer <string>   
Specify transfer characteristics [undef]
    \- undef, bt709, bt470m, bt470bg,
      smpte170m, smpte240m, linear, log100,
      log316, iec61966\-2\-4, bt1361e,
      iec61966\-2\-1, bt2020\-10, bt2020\-12
.TP
\fB\-\-colormatrix <string>
Specify color matrix setting [undef]
    \- undef, bt709, fcc, bt470bg, smpte170m,
      smpte240m, GBR, YCgCo, bt2020nc, bt2020c
.TP
\fB\-\-chromaloc <integer> 
Specify chroma sample location (0 to 5) [0]
